photoelectric relay

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photoelectric relay [¦fōd·ō·i′lek·trik ′rē‚lā]

(electronics)

A relay combined with a phototube and amplifier, arranged so changes in incident light on the phototube make the relay contacts open or close. Also known as light relay.

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No references found			Photoelectric devices photoelectric door opener Photoelectric Effect Photoelectric Effect, Internal photoelectric electron-multiplier tube Photoelectric Exposure Meter photoelectric flame-failure detector photoelectric fluorometer Photoelectric Galvanometer Amplifier, Balanced Photoelectric Guiding Device photoelectric imaging photoelectric infrared radiation photoelectric intrusion detector photoelectric lighting control photoelectric liquid-level indicator photoelectric loop control photoelectric magnitude photoelectric photometer photoelectric photometry photoelectric plethysmograph photoelectric process photoelectric pyrometer photoelectric reader photoelectric reflectometer photoelectric register control photoelectric relay photoelectric scanner photoelectric smoke detector photoelectric smoke-density control photoelectric sorter Photoelectric Spectroscopy photoelectric transmissometer photoelectric tube photoelectric turbidimeter Photoelectricity photoelectrolysis Photoelectromagnetic Effect Photoelectromotive Force Photoelectron photoelectron holography Photoelectron Spectroscopy Photoemission photoemission threshold photoemissive cell photoemissive tube photometer photoemissivity photoemitter photoengraving Photoengraving Machine photoengraving zinc photoenlarger			Photoelectric Effect, Internal photoelectric electron-multiplier tube photoelectric emission photoelectric emission photoelectric emission Photoelectric Exposure Meter photoelectric flame-failure detector photoelectric fluorometer Photoelectric Galvanometer Amplifier, Balanced Photoelectric Guiding Device photoelectric imaging photoelectric infrared radiation Photoelectric Injector photoelectric intrusion detector photoelectric lighting control photoelectric liquid-level indicator photoelectric loop control photoelectric magnitude photoelectric magnitude photoelectric photometer photoelectric photometry photoelectric plethysmograph photoelectric process photoelectric pyrometer photoelectric reader photoelectric reflectometer photoelectric register control photoelectric relay photoelectric scanner photoelectric smoke detector photoelectric smoke-density control photoelectric sorter Photoelectric Spectroscopy photoelectric transmissometer photoelectric tube photoelectric turbidimeter Photoelectric Web Guide photoelectrical photoelectrical photoelectrical photoelectrically photoelectrically photoelectrically photoelectricity photoelectricity photoelectricity Photoelectrochemistry Photoelectrolysis Photoelectromagnetic photoelectromagnetic effect photoelectromotive force photoelectron photoelectron photoelectron Photoelectron Diffraction photoelectron holography Photoelectron Intensity Angular Distribution Photoelectron Microscopy

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